Detailed examples of PHP operations on MongoDB databases (add, delete, modify, and query) (6)

Detailed examples of PHP operations on MongoDB (add, delete, modify, and query) (6) PHP operations on mongodb:

Modules are required for PHP to operate mongodb.
Official website can download: http://pecl.php.net/package/mongo download

Set mongodb to user-authorized startup mode

The php Manual does not have some user authorization methods for login:
Conn. php
$ Conn = new Mongo ("mongodb: // user1: 123456 @ localhost: 27017/test"); // link to the mongodb test database authorized by the user
$ Db = $ conn-> test;
?>

Find. php
Include "conn. php ";
$ C1 = $ db-> c1; // operates the c1 set.

// Json cannot be used directly in php
// Db. c1.find ({name: "user1 "});
// {Name: "user1" }== array ("name" => "user1") in this form
// [1, 2] = array (1, 2 );
// {} = Array ()

$ Arr = array ();
$ Rst = $ c1-> find ($ arr );
Foreach ($ rst as $ val ){
Echo"

";
Print_r ($ val ['name']); // Obtain "_ id" if the id is used"
}
  
  
Example 2: query with specified values
$ Arr = array ("name" => "user1"); // query
$ Rst = $ c1-> find ($ arr );
Foreach ($ rst as $ val ){
Echo"
";
$ Fs = $ val ['_ id'];
Print_r ($ val );
Echo ""; // you will find that the fid is converted into a string when it is uploaded to user. php. how can this problem be solved?
// User. php query mongodb data based on _ id
 
  Include "conn. php ";
$ C1 = $ db-> c1;
$ Oid = new Upload ID ($ _ GET ['fid']); use this to go through
Var_dump ($ oid); // or Object. If this parameter is not converted, it is of the string type.
  
$ Arr = array ("_ id" => "$ oid ");
$ Rst = $ c1-> find ($ arr );
Foreach ($ rst as $ val ){
Echo"
";
Print_r ($ val );
}
?>
}
  
  
Example 3: Add
Include "conn. php ";
$ C1 = $ db-> c1;
// Db. c1.insert ({"name" => "user3", age: 30, "sex" => "nan "});
$ Arr = array ("name" => "user3", "age" => 30, "sex" => "nan ");
If ($ c1-> insert ($ arr ))
Echo 'successfully ';
Else
Echo 'failed ';
  
  
  
  
Example 4: delete
Include "conn. php ";
$ C1 = $ db-> c1;
// Db. c1.remove ({"name" => "user2 "});
$ Arr = array ("name" => "user2 ");
If ($ c1-> remove ($ arr ))
Echo 'deleted successfully ';
Else
Echo 'deletion failed ';
  
  
  
  
Example 4: Modify
Include "conn. php ";
$ C1 = $ db-> c1;
// Db. c1.update ({"name" => "user2"}, {$ set: {age: 20, sex: "nan"}); add a field
$ Sarr = array ("name" => "user2 ");
$ Darr = array ('$ set' => array ('Sex' => 'Nan', 'age' => 24 ));
$ Opts = array ('upsert '=> 0, 'multiple' => 1 );
If ($ c1-> update ($ sarr, $ darr, $ opts) // update in php can only pass three parameters
Echo 'changed successfully ';
Else
Echo 'change failed ';
  
// Close
$ Conn-> close ();
?>